What is the best reason you have for Pluto to remain a planet?

Scientists have demoted it to a dwarf. The nerve! If you're still dead set on calling Pluto one of the nine planets, here are the reasons why that's perfectly reasonable. read more

Whether you are an astronomer or not, you can use the IAU definition, or you can use the traditional definition of “wandering star” under which nobody can argue Pluto isn’t a planet. It doesn’t really matter at all to anybody who isn’t an astronomer. read more

And with those images, and old wound has been opened: The demoting of Pluto from"planet" to"dwarf planet" status in 2006. Plenty of folks still count Pluto as a planet. And they have their reasons. For starters, New Horizons has confirmed that Pluto has mountains and water. read more